38 FREE TOOLS · ⇄
Unit converters calculators
Convert common measurements using published unit definitions.
Length & distance
Convert common international length and distance units.
Explore topic ↗4 calculatorsMass & weight units
Convert kilograms, pounds, grams and avoirdupois ounces.
Explore topic ↗6 calculatorsLiquid volume
Convert litres and explicitly named US or UK gallon conventions.
Explore topic ↗4 calculatorsArea units
Convert floor and land areas between metric and international customary units.
Explore topic ↗4 calculatorsSpeed units
Convert distance-per-time rates without changing the measured motion.
Explore topic ↗4 calculatorsTemperature scales
Convert absolute temperature readings among Celsius, Fahrenheit and kelvin.
Explore topic ↗4 calculatorsEnergy & pressure units
Convert energy and pressure using explicit SI factors.
Explore topic ↗4 calculatorsTime & angle units
Convert decimal time quantities and angle scales.
Explore topic ↗All unit converters calculators
Metres to Feet Converter
Convert metres to feet with an explicit conversion factor.
Feet to Metres Converter
Convert feet to metres with an explicit conversion factor.
Inches to Centimetres Converter
Convert inches to cm with an explicit conversion factor.
Centimetres to Inches Converter
Convert cm to inches with an explicit conversion factor.
Kilometres to Miles Converter
Convert km to miles with an explicit conversion factor.
Miles to Kilometres Converter
Convert miles to km with an explicit conversion factor.
Kilograms to Pounds Converter
Convert kg to lb with an explicit conversion factor.
Pounds to Kilograms Converter
Convert lb to kg with an explicit conversion factor.
Grams to Ounces Converter
Convert g to oz with an explicit conversion factor.
Ounces to Grams Converter
Convert oz to g with an explicit conversion factor.
Litres to US Gallons Converter
Convert L to US gal with an explicit conversion factor.
Litres to UK Gallons Converter
Convert L to UK gal with an explicit conversion factor.
US Gallons to Litres Converter
Convert US gal to L with an explicit conversion factor.
UK Gallons to Litres Converter
Convert UK gal to L with an explicit conversion factor.
Square Feet to Square Metres Converter
Convert sq ft to m² with an explicit conversion factor.
Square Metres to Square Feet Converter
Convert m² to sq ft with an explicit conversion factor.
Acres to Hectares Converter
Convert acres to ha with an explicit conversion factor.
Hectares to Acres Converter
Convert ha to acres with an explicit conversion factor.
Kilometres Per Hour to Metres Per Second Converter
Convert km/h to m/s with an explicit conversion factor.
Metres Per Second to Kilometres Per Hour Converter
Convert m/s to km/h with an explicit conversion factor.
Miles Per Hour to Kilometres Per Hour Converter
Convert mph to km/h with an explicit conversion factor.
Kilometres Per Hour to Miles Per Hour Converter
Convert km/h to mph with an explicit conversion factor.
Kilowatt Hours to Joules Converter
Convert kWh to J with an explicit conversion factor.
Joules to Kilowatt Hours Converter
Convert J to kWh with an explicit conversion factor.
Bar to Pascals Converter
Convert bar to Pa with an explicit conversion factor.
Pascals to Bar Converter
Convert Pa to bar with an explicit conversion factor.
Minutes to Hours Converter
Convert minutes to hours with an explicit conversion factor.
Hours to Minutes Converter
Convert hours to minutes with an explicit conversion factor.
Radians to Degrees Converter
Convert radians to degrees with an explicit conversion factor.
Degrees to Radians Converter
Convert degrees to radians with an explicit conversion factor.
Celsius to Fahrenheit Converter
Convert a temperature on the Celsius scale to Fahrenheit.
Fahrenheit to Celsius Converter
Convert Fahrenheit temperature readings to Celsius.
Celsius to Kelvin Converter
Convert a Celsius temperature to absolute temperature in kelvins.
Kelvin to Celsius Converter
Convert absolute temperature in kelvins to Celsius.
Millilitres to US Fluid Ounces Converter
Convert millilitres to explicitly US customary fluid ounces.
US Fluid Ounces to Millilitres Converter
Convert US liquid fluid ounces into millilitres.
Centimetres to Feet and Inches Calculator
Express a non-negative height as whole feet and a decimal inch remainder.
Feet and Inches to Centimetres Calculator
Convert a mixed feet-and-inches measurement into centimetres.
Make your inputs count
Check the exact unit convention, especially for gallons, ounces and miles. Temperature readings require an offset as well as a scale factor. Displayed results are rounded even when the underlying conversion factor is exact.